Weight cycling is the repeated loss and regain of body weight. When weight
cycling is the result of dieting, it's called "yo-yo" dieting. A weight cycle
can range from small weight losses and weight gains (5-10 lbs. per cycle) to
large changes in weight (50 lbs. or more per cycle).

Some experts believe that weight cycling may be harmful to your health and
that staying at one weight is better than weight cycling, even for those people
who are obese. However, there is no convincing evidence to support these claims,
and most obesity researchers believe that obese individuals should continue
trying to control their body weight despite some weight cycling.

Are Weight Cycling and Yo-Yo Dieting Harmful?

So far studies have not definitively shown that weight cycling and yo-yo
dieting are harmful. However, further research on the effects of weight cycling
is needed.

In the meantime, a fear of weight cycling should not stop an obese person
from achieving a modest weight loss. Although health problems associated with
weight cycling have not been proven, the health-related problems of obesity are
well known.

If you are not obese and have no risk factors for obesity-related illness,
focus on preventing further weight gain by increasing your exercise and eating
healthy foods, rather than trying to lose weight. If you do need to lose weight,
you should be ready to commit to lifelong changes in your eating behaviors,
diet, and physical activity.

Is Regained Weight Harder to Lose?

Not necessarily. People who repeatedly lose and gain weight through weight
cycling and yo-yo dieting should not experience more difficulty losing weight
each time they diet.

If I Weight Cycle or Yo-Yo Diet, Will It Make Me Fatter?

Weight cycling and yo-yo dieting don't appear to increase the amount of fat
tissue in people who lose and regain weight. Researchers have found that after a
weight cycle, people have the same amount of fat and lean tissue as they did
prior to weight cycling.

Some people are concerned that weight cycling can cause more fat to collect
in the abdominal (stomach) area. People who tend to carry their excess fat in
the abdominal area, instead of in the hips and buttocks, are more likely to
develop the health problems associated with obesity. However, studies have not
found that after a weight cycle people have more abdominal fat than they did
before weight cycling.